class Solution {
public:
    int removeElement(int A[], int n, int elem) {
        // Start typing your C/C++ solution below
        // DO NOT write int main() function
    	int cur = 0;
		for (int i = 0; i < n; ++i) {
			if (A[i] != elem) {
				A[cur++] = A[i];
			}
		}
		return cur;

    }
};